Fix a regression with cut off images.

This regressed in commit 3f41851 due to shadow variables.

BUG=478164
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1101443004

(cherry picked from commit 97d10aff654e42c1b7c3d2abf33fbcf8d341799e)

Review URL: https://codereview.chromium.org/1101203002
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 79d7351..2e642be 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -238,7 +238,7 @@
     if (m_bColorKey) {
         m_bpp = 32;
         m_AlphaFlag = 2;
-        FX_SAFE_DWORD pitch = CalculatePitch32(m_bpp, m_Width);
+        pitch = CalculatePitch32(m_bpp, m_Width);
         if (!pitch.IsValid()) {
             return FALSE;
         }
@@ -282,7 +282,7 @@
     if (m_bColorKey) {
         m_bpp = 32;
         m_AlphaFlag = 2;
-        FX_SAFE_DWORD pitch = CalculatePitch32(m_bpp, m_Width);
+        pitch = CalculatePitch32(m_bpp, m_Width);
         if (!pitch.IsValid()) {
             return 0;
         }